1c5c0fdbeSDavid 'Digit' Turner /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2c5c0fdbeSDavid 'Digit' Turner /* const.h: Macros for dealing with constants. */ 3c5c0fdbeSDavid 'Digit' Turner 4c5c0fdbeSDavid 'Digit' Turner #ifndef _LINUX_CONST_H 5c5c0fdbeSDavid 'Digit' Turner #define _LINUX_CONST_H 6c5c0fdbeSDavid 'Digit' Turner 7c5c0fdbeSDavid 'Digit' Turner /* Some constant macros are used in both assembler and 8c5c0fdbeSDavid 'Digit' Turner * C code. Therefore we cannot annotate them always with 9c5c0fdbeSDavid 'Digit' Turner * 'UL' and other type specifiers unilaterally. We 10c5c0fdbeSDavid 'Digit' Turner * use the following macros to deal with this. 11c5c0fdbeSDavid 'Digit' Turner * 12c5c0fdbeSDavid 'Digit' Turner * Similarly, _AT() will cast an expression with a type in C, but 13c5c0fdbeSDavid 'Digit' Turner * leave it unchanged in asm. 14c5c0fdbeSDavid 'Digit' Turner */ 15c5c0fdbeSDavid 'Digit' Turner 16c5c0fdbeSDavid 'Digit' Turner #ifdef __ASSEMBLY__ 17c5c0fdbeSDavid 'Digit' Turner #define _AC(X,Y) X 18c5c0fdbeSDavid 'Digit' Turner #define _AT(T,X) X 19c5c0fdbeSDavid 'Digit' Turner #else 20c5c0fdbeSDavid 'Digit' Turner #define __AC(X,Y) (X##Y) 21c5c0fdbeSDavid 'Digit' Turner #define _AC(X,Y) __AC(X,Y) 22c5c0fdbeSDavid 'Digit' Turner #define _AT(T,X) ((T)(X)) 23c5c0fdbeSDavid 'Digit' Turner #endif 24c5c0fdbeSDavid 'Digit' Turner 25c5c0fdbeSDavid 'Digit' Turner #define _UL(x) (_AC(x, UL)) 26c5c0fdbeSDavid 'Digit' Turner #define _ULL(x) (_AC(x, ULL)) 27c5c0fdbeSDavid 'Digit' Turner 28c5c0fdbeSDavid 'Digit' Turner #define _BITUL(x) (_UL(1) << (x)) 29c5c0fdbeSDavid 'Digit' Turner #define _BITULL(x) (_ULL(1) << (x)) 30c5c0fdbeSDavid 'Digit' Turner 31*d0bf492fSCédric Le Goater #define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (__typeof__(x))(a) - 1) 32c5c0fdbeSDavid 'Digit' Turner #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) 33c5c0fdbeSDavid 'Digit' Turner 34c5c0fdbeSDavid 'Digit' Turner #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 35c5c0fdbeSDavid 'Digit' Turner 36c5c0fdbeSDavid 'Digit' Turner #endif /* _LINUX_CONST_H */ 37